1. The converter can convert coaxial or non-digital audio signals into analog L or R audio, and can be connected to an external device such as an amplifier through a standard RCA connector. Or a 3.5mm headphone jack output, connected to true high-security headphones, which are Perfect for exchanging home or professional audio. 2. Bi-directional switch The bi-directional switch design makes it more than a DAC converter. It not only supports digital to analog converters, but also digital to digital (supports ToSink to coaxial and coaxial to TSLink). Note: This converter supports digital simulation but does not support analog to digital. 3. Support volume adjustment, built-in hi-fi amplifier chip, L or R and 3.5mm output, can drive 16 - 150 ohm impedance headphone or sound. It supports volume control and Volume control knob Only used to adjust the volume of the headphone jack and RCA jack, not coaxial or sink. 4. "Plug and Play", coaxial cable, no need to install additional programs, plug and play (note: this converter does not support 5.1ch such as Dalby and DTS Set the audio output in PCM or LPCM before use PRO and SLIM cannot use this converter). 5. Use the volume knob to achieve 192kHz sampling rate, which can adjust the volume of the RCA L or 3.5mm jack audio output for easy R and use (note: DoSink or coaxial audio output is not can control). It currently supports sample rates of 32, 44.1, 48, 96 and 192KHz, as well as 24-bit S or PDIF input bitstreams on the left and right channels. Specifications: Type: Audio adapter or converter Bit rate: 16-24 bit Output impedance: 16-300 ohm Operating voltage: 5V Weight: 124g Note: 1. There is a power switch on the volume knob. Please turn on the power switch before using the DAC. 2. Set the audio output to PCM or LPCM format. 3.For TV, if there is no sound even if you set the audio output to PCM or LPCM format, please turn on the external speaker of the TV (sounds-speaker setting-HESB or external speaker on). 4. This converter does not support 5.1 channels such as and DTS. 5. Pro and Slim cannot use this converter because they do not have a fiber output interface. colour: black Material: metal size: 6.1x5.7x2cm Package Contents: 1 x Audio Converter 1 x Conversion Cable Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is 1-3cm. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.